... ,We are specialize in produce all kinds of precision machinery parts(nuts,bolts,fasteners,washers,pipe fitting,washers,etc), ... GB ASTM DIN JIS4 Process drawings-mould making-raw casting-sandblasting-rough machining-finish machining-surface treatment-product ... polishing,electro-plating,chemical plating,painting6 Equipment melting furnance,casting machines,drill machine,laser cutting lathes,CNC machines, ...